Krogh is a small lunar impact crater that is located in the eastern part , to the southeast of the crater Auzout. The crater is roughly circular and bowl-shaped, with an inner wall that is wider in the north than the south. It is otherwise an undistinguished formation. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.